A two-process theory of human information processing is proposed and applied to detection, search, and attention phenomena. (Editor)

While it is clear that schizophrenic patients often exhibit disordered thinking, the specific nature of the deficit and its role, either as a basis of abnormal behavior or as a symptom of malfunction in some underlying control process, remain to be clarified by research and by theory. Describes two experiments on the performance of conceptual…

The major aim of this research was to study the ability of schizophrenic patients to solve problems that involve abstract thought and to transfer training from one problem to another. (Author/RK)

The production of informationally redundant choices in a selection concept attainment task was investigated in relation to age and intelligence, using 62 adolescents aged 12:7--15:6 drawn from the lower middle ability range of a comprehensive school. (Editor)

Responds to Needham and Baillargeon's criticisms and offers an alternative resolution of the conflicting results between the laboratories regarding abilities of infants less than 12 months to use property/featural information for object individuation. Maintains that kind concepts are acquired as infants approach their first birthday and that…

Future research initiatives on learning and instruction are considered to be of most worth if grounded in general systems theory and if multiple research methods are used. Discussed are an information processing theory and a theory for the structure and structuring of stored information. (MNS)

Piaget, in describing the sequence of classificatory development, describes class inclusion as composed of two processes; hierarchical classification and post-whole comparisons. In the experiment reported here, elementary school children, trained in the concept of sets in first grade mathematics were given a task where they were required to assess…